Inconel 601 alloy exhibits superior high-temperature oxidation resistance, while Inconel 625 alloy, due to its molybdenum content, performs better in corrosion resistance and high-stress environments. The main difference lies in the fact that alloy 601 is optimized for heat resistance and oxidation resistance, making it suitable for furnace components and chemical processing; while alloy 625 combines high strength, high toughness, and resistance to high temperatures and various corrosive substances, making it widely used in demanding fields such as oil and gas and aerospace.
What is the difference between Inconel 601 and Inconel 600?
Inconel 600 and Inconel 601 are two very common high-temperature alloys. Both alloys have good high-temperature performance. Inconel 601 has more chromium added compared to Inconel 600. Therefore, their main difference lies in their oxidation resistance.
Inconel 601 and Inconel 625 are both high-performance nickel-chromium alloys, renowned for their corrosion resistance and high-temperature performance. However, their compositions, mechanical properties, and applications differ, making them suitable for various environments. Below is a detailed comparison of the key characteristics of Inconel 601 and Inconel 625.
Chemical Composition
| Element | Inconel 601 | Inconel 625 |
|---|---|---|
| Nickel (Ni) | 58-63% | 58-72% |
| Chromium (Cr) | 21-25% | 20-23% |
| Iron (Fe) | Balance | Balance |
| Molybdenum (Mo) | None | 8-10% |
| Niobium (Nb) | None | 3.15-4.15% |
| Carbon (C) | ≤0.10% | ≤0.10% |
| Aluminum (Al) | 1.0-1.5% | None |
Mechanical Properties
| Property | Inconel 601 | Inconel 625 |
|---|---|---|
| Yield Strength (MPa) | 250 – 450 | 200 – 310 |
| Ultimate Tensile Strength (MPa) | 550 – 750 | 450 – 700 |
| Elongation (%) | 30% (min) | 30% (min) |
| Hardness (Rockwell B) | 85-95 | 85-100 |
High-Temperature Performance
| Feature | Inconel 601 | Inconel 625 |
|---|---|---|
| Service Temperature | Up to 2,100°F (1,149°C) | Up to 1,900°F (1,038°C) |
| Oxidation Resistance | Excellent | Excellent |
| Creep Resistance | Good | Very good |
Corrosion Resistance
| Corrosion Type | Inconel 601 | Inconel 625 |
|---|---|---|
| General Corrosion | Very good | Excellent |
| Pitting Corrosion | Good | Excellent |
| Stress Corrosion Cracking | Excellent | Excellent |
| Acid Resistance | Good in certain acids | Excellent in a broader range |
Weldability Comparison
| Feature | Inconel 601 | Inconel 625 |
|---|---|---|
| General Weldability | Good; may require specific filler material | Good; usually does not require preheating |
| Post-Weld Heat Treatment | Generally not required | Not usually required |
| Filler Material | ERNi 601 | ERNi 625 |
Typical Applications
| Application Area | Inconel 601 | Inconel 625 |
|---|---|---|
| Chemical Processing | Reaction vessels, heat exchangers | Equipment in chemical processing |
| Aerospace | Jet engine components | Aircraft engines and components |
| Oil and Gas Industry | Pipelines, valves | Offshore and downhole applications |
| Power Generation | Gas turbines | Heat exchangers and components |
| Industrial Furnaces | Furnace components | High-temperature furnace environments |
Why Choose Gnee Nickel Alloy (Supplier Example)?
✅ Large stock of Incoloy alloy tubes/bars/plates/fittings/coils, fast shipping.
✅ Factory direct sales, highly competitive prices, excellent value for money.
✅ Comprehensive quality assurance: Material Testing Certificate (MTC), chemical composition certificate, and mechanical property certificate.
✅ Value-added services: slitting, cutting, polishing, surface treatment.
✅ Worldwide shipping, secure and reliable packaging, and provision of export-required documents.
Email: ss@gneemetal.com
Gnee Steel is a supplier of Inconel 601/625 alloy, offering a wide range of products including: seamless pipe (sizes: 4-219 mm; thickness: 0.5-20 mm); welded pipe (sizes: 5.0-1219.2 mm; thickness: 0.5-20 mm); plates (thickness: 0.1 to 100 mm; width: 10-2500 mm); strips; alloy round bars (diameter: 3-800 mm); flat bars (thickness: 2-100 mm; width: 10-500 mm); hexagonal bars (size: 2-100 mm); wire rods; and extruded profiles. We collaborate with steel mills to provide our customers with Inconel 601/625 alloy products that meet or exceed numerous leading industry standards, including ASTM, ASME, SAE, AMS, ISO, DIN, EN, and BS standards.
Gnee Steel stocks and sells Inconel 601/625, pipes, plates, strips, round bars, flat bars, forged billets, hexagonal steel, wire rods, and extruded profiles. Please feel free to contact us at ss@gneesteel.com for a quote.
